Packing.



No. 743,666. PATENTED NOV. 10, 1903.

' R. M. SHAEFER.

- PACKING.

APPLICATION FILED AUG. 19, 1902.

N0 MODEL.

m: minis Perms ca, amour. w5smnm'on. n. c;

No. 74.3,666. latented November 10, 1903.

UNITED STATES PATENT OFFICE.

RICHARD M. SHAFFER, OF BALTIMORE, MARYLAND, ASSIGNOR TO SHAFFER BOILER & ENGINE MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

PACKING.

SPECIFICATION forming part oi? Letters Patent No. 743,666, dated November 10, 1903. Application filed August 19, 1902. Serial No. 120,171. (No model.)

To all whom it may con-corn: w of the case 2 with a part fi ed relatively to a Be it known that I, RICHARD M. SHAFFER, movable member 4, and it should be undera citizen of the United States, and a resident stood that the parts 1 and 3 are merely repof Baltimore city, in the State of Maryland, resentative of such provision. Where the 5 have invented certain new and useful Imparts 1, 2, and 3 encircle the rod 4, (see nuprovements in Packin'gs, of which the followmorals 5, 6, and 7 sufficient space is allowed ing is a complete specification, reference beto permit of slight or usual transverse vibraing had to the accompanying drawings. tion of the rod 4 without material impinge The object of my invention is to produce a ment of the rod against the parts 1, 2, or 3. to simple, durable, and efficient packing for pis- Assuming that the head 1 is united properly ton-rods or the like which is readily adaptable to its cylinder and that steam or other gas to all conditions in use. is introduced into such cylinder, it will be In the accompanying drawings, Figure I is obvious from the foregoing specification and adiametrical section ofacylinder-head shown drawings that it can escape through the cyl- 15 for the purpose of illustration and within the ind er-head 1 only around the outer edge of the same one of my packing-joints disposed about ring3 or around the inner edge thereof bea portion of apiston-rod shown in elevation. tween it and the rod 4. Itis well understood The following figures show in aggroupment in the art that such difficulty as there may be all of the members that'constitute my joint in packing such joints as that between the 2o proper except the cap, which although perring 3 and the case 1 is readily surmounthaps not strictly a part of the joint must be able',and therefore the only considerable probin some form provided for the assembling of lem presented in preventing leakage between the remaining members. In that group,Fig. such an assemblage of parts as that shown 11 is a perspective view of one terminal anand described and the rod lis with respect to 25 nulus. Fig. III is a similar view of one cone the inner edge of the ring 3 and the rod 4.

made up of a plurality of segments. Fig. IV Such detailed specification as the foregoing is a similar view of the cylinder provided with is here introduced not because it is supposed an internal double-concave annulus against to present any novel proposition to one skilled which the segmental cones are respectively in the art, but only to render the terms of o seated. Fig. V is a similar view of a second this specification and the relations of the cone corresponding to the one shown in Fig. parts of my device clear and unmistakable. III. Fig. VI is a similar view of the second Coming now to the consideration of that terminal annulus corresponding to the one which more essentially constitutes my presshown in Fig. II, and Fig. VII is a similar ent invention, 9 indicates a cylinder that view of the case within which the abovepreferably fits loosely on all sides within the illustrated members of the packing may be case 2'and which constitutes an assembling assembled. member for the members of my packing Referring to the numerals on the drawings, proper. The cylinder 9 contains an annular 1 indicates as representative of a member internal projection 10, which being provided 0 .o with which my packing is to be assembled a upon its opposite sides with concave faces 11 cylinder-head provided with a recess for the is preferably but not necessarily made intoreception of the case 2. The depth of the regral with the cylinder 9, which contains it. cess is sufficiently greater than the height of The member 10, making knife-edge contact the case to admit within its internally-threadwith the rod 4, as indicated at 12, is designed 5 ed end an externally-screw threaded capto closely constrict the segmental cones ring 3. (shown in Figs. III and V) into perfect con- 4 indicates by wayof example of a member tact with the rod 4,, and for that reason its to be packed a piston-rod. faces 11 are made to fit snugly the external With respect to the parts 1, 2, and 3 it is faces of said cones. The cones are identical :oo 50 sufficient that provision be made in any pracin shape and dimensions, are each provided 7 ticable manner for the operative assembling with bores, and are each composed of a plurality of segments, preferably three in number-to wit, segments 13, 14, and 15. The segments are likewise severallyidentical and are only assigned separate reference-numerals for convenience in specifying them. The characteristic feature of the cone-segments is that while they are adapted to'make perfect contact with the rod 4 and the faces 11 of the projection 10, as above specified, they do not when newly assembled upon the rod to be packed, of which the rod 4 affords a representation, make a complete ring or annulus. In other words, the assembled segments being non-contiguous essentiallyconstitute a broken annulus, each of the segments being separated from its neighbor by a narrow slit, as clearly shown in Figs. III and V of the drawings. The means of assembling the broken annuli upon the rod 4 or corresponding member suffice to prevent leakage around the rod so long as the segments of the broken annuli are non-contignous. When by friction between the rod 4 and the inner bore of the assembled seg ments the segments are so far worn away as to permit them to make contact one with the other, they are then worn out and should be replaced in order to preserve a tight joint about the rod 4. After the cones are in place within the cylinder 9 the opposite ends of the cylinder preferably extend a short distance to accommodate annuli 17 and 18, which are preferably employed, and fit snugly against the inner surface of the cylinder 9 and the face of the rod 4, respectively. One annulusfor instance, annulus 17 is seated against the inner face of the cap-ring 3, making perfect contact therewith. It will be understood from the drawings and foregoing description that steam or other pressure against the annulus 18 will drive the parts of the packing togetherabout the rod and that therefore such pressure may be relied upon solely to render my packing, as already specified, operative for the purpose for which it is designed; butin order to keep the parts snugly in position and to prevent a possible initial leakage, howeverinconsiderable, I prefer to employ an annular dished spring 19 between the bottom of the case 2 and the adjacent annulus, the one illustrated being 18, but which might be 17, as the cylinder 9 and its contents are reversible.

From the foregoing description and the drawings the mode of operation of my device will clearly appear to one skilled in the art; but it may be well to state that my invention operates upon the principle of breakingjoints between the several packing and packed members whereby straight passages for the possible escape of steam are eliminated and continuing perfect contact between said parts is compelled. It may be also observed that the use of objectionable springs is dispensed.

with and that all the operative parts of the packing are loose and capable of taking up wear as it occurs in use.

What I claim is- 1. A packing comprising a pair of non-contiguously -segmental cones provided with bores, an intermediate concave annul.us,a cylinder containing the same, and means of assembling the parts.

2. A packing comprisinga pair of non-contiguouslysegmental cones, provided with bores, an intermediate concave annulus, a cylinder containing the same, a pair of annuli upon opposite sides of the cones respectively and means of assembling the parts.

3. Apacking comprising a'pair of non-contiguously-segmental cones provided with bores, an intermediate concave annulus, a pairof annuli npon oppositesidesof the cones respectively, a spring and means of assembling the parts, substantiallyfor the purpose specified.

4. In a packing the combination with a cylinder provided with an internal double-concave annular projection adapted to present a knife-edge contact with a rod working in the packing, a pair of non-contiguously-segmental cones provided with bores, and means for compelling the parts into continuous operative contact with one another.

5. In a packing the combination with a recessed member, cap, ring and case, of a cylinder loose within the case, a pair of noncontiguously-segmental cones provided with boresand intermediate concave annulusand annuli in the opposite ends of the cylinder within the case.

In testimony of all which I have hereunto subscribed my name.

RICHARD M. SHAFFER.

Witnesses:

N. G. WHITE, P. R. M. CRUM. 

